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handle is hein.crs/goveibx0001 and id is 1 raw text is: Congressional                                                        ____
aResearch Service
Responding to Drought in the Colorado River
Basin: Federal and State Efforts
Updated August 9, 2022
The Colorado River Basin (Figure 1) covers more than 246,000 square miles in seven U.S. states and
Mexico. Basin waters are managed and governed by multiple laws, court decisions, and other documents
known collectively as the Law of the River. The Colorado River Compact of 1922 established a
framework to apportion water supplies between the river's Upper and Lower Basins (divided at Lee Ferry,
AZ). Each basin was allocated 7.5 million acre-feet (MAF) annually under the compact; an additional 1.5
MAF in annual flows was made available to Mexico under a 1944 treaty. Since the Upper Basin's waters
were developed after the Lower Basin, its apportionments are less than the full amount allowed under the
compact and are framed in terms of percentages of available supplies. The Bureau of Reclamation
(Reclamation) plays a prominent role in basin water management due to the many federally authorized
projects in the basin.
Congressional Research Service
https://crsreports. congress.gov
IN11982

CRS INSIGHT
Prepared for Members and
Committees of Congress -

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